What Is a Safety Management System (SMS) in Aviation?

SMS in One Sentence

Traditional safety waits for something to go wrong and then investigates. An SMS looks for small warning signs — a near miss, a confusing procedure, a recurring maintenance write-up — and fixes the problem before it becomes an accident.

The Four Components of an SMS

1. Safety Policy

This is leadership's written commitment to safety. It includes a signed safety policy, safety objectives, a code of ethics, and a clear statement that employees can report safety issues without fear of punishment. It also names an accountable executive — the one person ultimately responsible for the SMS — and spells out who is responsible for what.

Source: 14 CFR Part 5, Subpart B (§5.21–§5.27)

2. Safety Risk Management (SRM)

SRM is how you deal with hazards. You use it when something new is introduced — a new aircraft, a new route, a new procedure — or when a hazard is found. The steps are: describe the system, identify the hazards, assess the risk (how likely, how bad), and put controls in place to bring the risk to an acceptable level.

Source: 14 CFR Part 5, Subpart C (§5.51–§5.55)

3. Safety Assurance (SA)

Safety Assurance checks that your controls are actually working. It includes collecting safety data, running audits and evaluations, investigating incidents, operating a confidential employee reporting system, and tracking safety performance over time. When something isn't working, SA sends it back to SRM to be fixed.

Source: 14 CFR Part 5, Subpart D (§5.71–§5.75)

4. Safety Promotion

Safety Promotion builds a safety culture. Every employee gets SMS training suited to their job. The company communicates safety information, explains why safety actions were taken, and tells people what happened with the hazards they reported.

Source: 14 CFR Part 5, Subpart E (§5.91–§5.93)

Plus: Documentation and Records

You must keep written SMS documentation and records showing the system is working: SRM outputs, safety assurance results, training records and safety communications, each for its required retention period.

Source: 14 CFR Part 5, Subpart F (§5.95–§5.97)

How the Pieces Work Together

Think of SMS as a loop. A pilot reports a hazard (Safety Promotion encourages it). The safety officer assesses and controls the risk (Safety Risk Management). Audits and data confirm the fix worked (Safety Assurance). Leadership sets the rules and resources for all of it (Safety Policy). Then the loop starts again.

Does a Small Operator Really Need All This?

Yes, but it can be sized to fit. The FAA expects an SMS that is appropriate to the size and complexity of your operation. A single-aircraft operator won't have a safety department, but it still needs every component. That's where good tools matter: an electronic SMS handles the paperwork and tracking so a small team can run a real system.

Where to Go Next

• See how your operation measures up with the free SMS Compliance Checklist.
• Learn about the May 28, 2027 deadline.
• Get a Part 5 SMS manual from our partner ACCG.

Source: 14 CFR Part 5; FAA Advisory Circular AC 120-92B